MYTUTOR SUBJECT ANSWERS

471 views

What are the features of alveolar epithelium which allow efficient gas exchange?

The alveolar epithelium is very thin, just one cell layer thick. This means the diffustion distance is small, therefore diffusion of gases occurs rapidly.

Remember that diffusion is the net movement of particules from an area of high concentration to one where its concentration is lower. 

Diffusion will be faster if there is a greater difference in concentration between the two areas. This is known as the concentration gradient. A steep concentration gradient will increase diffusion rate. 

Each alveolus is highly vasculated (many capillaries surround the alveolus). This mantains a steep concentration gradient. Once blood adjacent to the alveolus has been oxygenated, it is rapidly removed by action of the heart, and replaced with deoxygenated blood. 

Similarly, the lungs maintain oxygen rich air in the alveoli through the process of ventilation. 

Shoam  B. GCSE Biology tutor, A Level Biology tutor, GCSE Chemistry t...

7 months ago

Answered by Shoam , an A Level Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

190 SUBJECT SPECIALISTS

£22 /hr

Jay G.

Degree: Biological Sciences (Biochemistry) (Bachelors) - Edinburgh University

Subjects offered:Biology, Maths+ 2 more

Biology
Maths
Mandarin
Chemistry

“I am here not only to help you get better at exams, but to help you enjoy your subject more ”

£24 /hr

Ed W.

Degree: Medicine (Bachelors) - Edinburgh University

Subjects offered:Biology, Maths+ 3 more

Biology
Maths
Further Mathematics
Chemistry
-Medical School Preparation-

“Hi! I'm Ed and I'm currently studying Medicine at the University of Edinburgh. I tutor at GCSE and A Level forBiology, Chemistry and Maths, and at GCSE level forFurther Maths. These are subjects I'm very comfortable in and enjoy. With ...”

£24 /hr

Nketia O.

Degree: Pharmacy (Masters) - Durham University

Subjects offered:Biology, Physics+ 1 more

Biology
Physics
Chemistry

“Hello! My name’s Nketia. I got an A* in A-Level Biology and an A in A-Level Chemistry. I’m a second-year Pharmacy student who is ready to teach others.”

About the author

£20 /hr

Shoam B.

Degree: Medicine (Bachelors) - Sheffield University

Subjects offered:Biology, -Medical School Preparation-

Biology
-Medical School Preparation-

“Hi! My name is Sho and I'm a first year medical student at Sheffield university. Getting into Medicine was tough and I really worked hard at school to make sure I understood the core principles of what was taught. I offer A-level Bio...”

You may also like...

Posts by Shoam

How do fish carry out gas exchange efficiently?

How does speciation occur?

What are the features of alveolar epithelium which allow efficient gas exchange?

Other A Level Biology questions

What is homeostasis?

How do auxins bring about positive phototropism in plants?

State two functions of membranes within cells

How does eutrophication work?

View A Level Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok